Combined type-writing and computing machine.



H. HANSON. COMBINED TYPE WRITING ANZ IIOMPUTING MACHINE.

APPLICATION IILET: 001219, 1907. I

Patented Dec. 1, 1908.

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H. EANSON. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED OCT. 19, 1907.

905,422, Patented Dec. 1, 1908.

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H. HANSON. COMBINED TYPE WRITING AND COMPUTING MACHINE. APPLICATION FILED 001.19. 1907.

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H. HANSON.

UOMBIN ED TYPE W'RITHG- AND COMPUTING MAOHINE.

APPLICATION EILED OGT.19, 1907.

Patented Dec. 1, 1908.

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H. HANSON.

comma]: TYPE WRITING AND COMPUTING MACHINE.

APPLIOATIOH FILED OCT. 19, 19077.

Patented Dec. 1,1908.

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COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED 0OT.19, 1907.

905,422. Patented. Dec 1, 1903.

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905,422. Patented Dec. 1, 1908.

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HANS HANSON, OF HARTFORD, CONNECTICUT.

COMBLNJLD TYPE-WEIETING AND COMPUTING MACHINE.

no. access.

Specification oi Letters Patent.

Patented Dec. 1, 1908.

Application filed October 19, 1907. Serial No. 398,185.

To all whom it may concern:

Be it known that I, Hans Hanson, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in a Combined Type- Vriting and Computing Machine; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to computing masecuring increased etiiciency and a greater Iii range of work.

To the above ends, my invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

The computing machine of my prior piitcut would add numbers in vertical columns listed either as solid or punctuated matter, and the punctuation could be varied so as to mark oii' dollars and cents merely, or so as to mark of? the whole numbers in sets of three figures, and with the dollars and cents separated by a period. prior patent would also multiply, but required the multiplicand to be reset for every figure of the multiplier.

The machine of my pending application will add in vertical columns with or without punctuation, according to which of the two forms of decimal order selector therein disclosed shall be employed in the machine, and will multiply without requiring the multiplicand to be reset, regardless of the number oi" figures in the multiplier.

My machine herein disclosed will not only add numbers listed in vertical columns like my prior machines, but will add numbers listed on horizontal lines crosswise of the printed shoot. Otherwise stated, my pres ent machine will make cross footings, or do a piece oi work like this:

If the travel oi the typewriter carriage be The machine of my.

suiiicient, my present machine will thus cross list and. add eight numbers in each line. The means to accomplish this additional or new result constitutes one important feature of my improvement or present invention. To this end, I provide a decimal order selector or rotary tappet drum which has four whirls or spiral rows of tappets, and the tappet drum is so geared to the typewriter that it receives two revolutions to each full line of the typewriter carriages travel. Each -whirlvor row of tappets will therefore be brought into action twice in each cross line, from which it fol lows that eight numbers can be cross listed and added.

As a detail of the new decimal order solector or rotary tappet drum, I am able to prearrange for punctuation in an extremely simple manner, to-wit, the use of a tappet with two points or tapping surfaces instead of one, wherever such punctuation is desired. For example, if the drum is built to provide for punctuation only between dollars and cents, a single two-pointed tappet is used in each whirl or row of tappets, located in the third position from the right end of the drum; and the effect of this is to make the two-pointed tappet act twice on its lifting lever, thereby requiring two steps of the typpwriters carriage movement to go by that lifting lever, thus leaving one space free wherein a pcriodor other punctuation mark may be struck, as, for example, the period between dollars and cents. 1

In my prior machines, I employed a separate set of so-called computer keys, representing the digits from 1 to 9, for operating the computing machine. Said computing keys were mounted on the typewriter and were of 'such construction that they would also operate the corresponding numeral keys of the typewriter; and, thereb cause the latter to list or print the 1mm ers on the typewritten sheet. The typewriter keys both numeral and character keys-wcre therefore free for the ordinary typewriter usage in practice, it was found that while the presence of the separate row of computer keys had the marked advantage aboveindicated, always leaving the typewriter tree for ordinary usage. there were also some dis advantages. ()llilri [he most prominent of these disadvantages was a variation of the computing key touch 11 compared with the ordinary typcwiucr usage. .iicmc, iu'my present machine, I dispense with a separate row of computerkeys and employ the numeral keys of the typewriter to operate the computer. I-am thereby able always to have the advanta e ofjthe momentum of the type bars to elp overcome the resistance or inertia of the parts of the computing mechanism set by the keys, and find that thereby the touch of the numeral keys, when.

in 'use for computing, remains nearly normal; and further, that the combined machine will be more reliable, both. in respect -to the-printing and the computing functions. Having made this change in respect to the kegs employed to operate the computer, it ecame necessary to make further additions. or modifications in the mechanism in order to preserve an equal range'of work of the same kind as that done'on my specifying the, items.

prior machines. For example, it was pos--' sible on prior machines and is possible onf'my present machine, to do a piece of work like this:

10 lbs. of sugar @15 cts. per lb ;50 1 ton of coal $7 .per ton 11 cords of wood $5 per cord 55.00 ,100 cords of wood $5 per cord 50.0.00

Tom"; $5621 50 It was easy enough to do this iece of work on my prior machine, because t e typewriter was always free for ordinary usage, and the computer keys never used except when it was desired to list and compute.

The numeral keys of an ordinary type-' writer, however, such, for example,-as the Underwood, each represents some other" character besides its proper number, such as-@, #7 $7 .s b (a In doing a piece of work, like the invoice above appearing, the numeral keys must beused in It is obvious that I when so used, they must not operate the not be accurate. 7 wh1ch \v1ll prevent the numeral keys from 1' operating the computer, in the zone of the computer; or otherwise the footings will Hence, a I provide means typewriters travel appropriated to the specification of the items, but permit them to operate the computer in the zone of the said carr ages travel appropriated for listing the numbers representlng the charge for each specified item. This means includes a cam which is operative to hold the lifting leversout of reach of the tappets of the decimal order selector for some predetermined 1' part ofthe carriages possible travel, as, for

example, threefourths of its travel; and then to let the lifting levers come back'withinthe field ofactionthereon by the tappets.

The foregoing are the principal features of my present invention. As minor features and details of improvement, I provide a somewhat improved error-correcting de-- eoaeaa vice; a device which will prevent the simultaneous depression of two adjacent numeral keys; and I also disclose herein a two-way full stroke device for said' numeral keys, but this is also disclosed and .claimed in a separate application filed of date August 12, 1907, Serial No. 388, 177

. \Vith the exception of the improvements -I but not quite identical'with the machine of my first patent.

above noted, the machine illustrated is nearly 1 In the machine of my pending application, special reliminary representation devices were a died to the machine of the first patent 'soas to enable multiplication, regardless of the number of figures 1n the multiplier, without requiring the multiplicand'to be reset. All these spe-- cial devices. are omitted from the machine herein illustrated and described for the sake of brevity and simplicity. or the same reason, the special details, which were resent in the machine of my'pending a p ication to secure high speed, are omitte from the illustrated mach1ne.. A great many of the parts represented, however, are abso-' lutely identical with the machine of my pending application; and for this reason the same classification of the mechanism and of p the reference letters applied thereto will be observed as far as possible. As to these old parts, the description will be simplified and abbreviated. The old parts will be detailed only as far as may be thought necessary to understand the improvement herein disclosed and claimed. It must be understood that the old parts, so far as not herein specified, are the same as in my prior machines,

both in structure and function.

With the-foregoing statements in mind, it

is thought that my present machine. can be fully. understood and utilized from thesecompanying drawings and the following further description.

My improved typewriting and computing machine is illustrated in the accompanying drawings, wherein like notations refer to like parts throughout the several views.

In said drawings; Figure 1 is a vertical A longitudinal section through the combined machine from front to rear approximately on the line .12 m of Fig. 3. Fig. 2 is also a vertical longitudinal section through the combined machine on the line .022 m of Fig. 3 looking in the oppositedirection from the view shown in Fig. 1, with some parts-removed.- Fig. 3 is a plan View of thebomputing machine detached from the typewriter,

6 is a view of the computing machine detached, partly in right side elevation and partly in section on the line an m of Fig. 3, with some parts removed and others broken away. Fig. 7 is a verticallongitudinal section through the computing machine detached, approximately on the irregular line m m of Fig. 3, with some parts removed. Fig, '8 is a detail in vertical section on the line :0 of Fig. 3, with some parts removed. Figs. 9 and 10 are details showing-one of the numeral keys and the two-way full stroke device in side elevation, but in different positions from that shown in Fig. 1.

-In the detailed description, the following classification of the mechanisms and of the reference notations appropriated thereto, have been made, to-wit:The parts of the typewriter and the computer case, designated by numerals. The register proper or counting devices, designated by a and its powers. The unit bars, their key and other connections, designated by Z) and its powers. Decimal order or register bars, preliminary representation devices or unit pins, operating carriage and associated parts, designated by c and its powers. Decimal order selector or rotary tappet drum, lifting levers and associated parts, designated by f and its powers. Error-correcting device designated by is and its powers.

F or the old parts illustrated, which are identical with the parts shown in my pending application, 'the same notations will chiefly here be employed as were used for the same parts in the said pending case; but as'more or less ofthe parts disclosed in the pending case will not be specified herein, the notations will not read, necessarily, in the regular orderof sequence as to the powers of the reference letters employed.

Typewriter and register casc.-The typewriter illustrated is a No. 5 Underwood. The construction and operation of such a typewriter is well understood, and for the purposes of this case, it is deemed sufficient to identify only a few of the parts thereof.

The numeral 1. represents the typewriter frame; 2 the typewriter carriage; 3the type bars; 4, the character keys; 4? the numeral keys; 5 the spacing bail or space bar. All these keys are spring held in their uppermost or normal position. The numeral 6 represents the spring held line feed lever which is applied to the platen or roller in the customary not shown, so that when the lever 6 is actuated, the roller and paper will be moved one step. as required for the line feed. The typewriter carriage is under tension from a suitable motor spring and moves from the right toward the left. with a stop by step motion, under the control of a suitable escapement subject to the key action.

These parts are all of the customary form and are partially lllustratcd in Fig. 5 of the drawings. For the purposes of this case, itis deemed suflicient to identify the motordriven gear wheel 7, and the carriage rack 8 with which the same engages.

The numeral 9 represents the computer case or main frame upon which the typewriter is detachably supported.

The rcgister.The register or counting mechanism of the computer is located near the forward end and cross center of the computer case 9, as shown inFigs. l, 2, 3 and 7. In the detail of its structure and mode of operation, the register is identical with the register disclosed in my above identified application; and in principle of structure and operation, the register 18 also substantially identical with the register disclosed in my above identified prior patent, differing therefrom only in some minor details. Hence,for the purposes of the present case it is not deemed necessary to specify and trace the action of the parts of tlns reg ister in detail. It is deemed sufficient to identify only a few of its parts. Said regis zter includes a proper set of decimal order or digit bearing wheels a (eight being shown), mounted on a cross shaft (0 supported in the computer case and having loosely mounted" on their hubs gear wheels a connecting therewith through an intermediate rat'chet and one-way ball clutch, not

shown, which wheels are in mesh with the teeth of the underlying rack-ended register bars 0 and are subject to the action thereof, when the carriage of the computer is moved forward by its hand lever 0 as Will later appear. The register wheels (4 are held against accidental movement by rollerequipped spring held levers a mounted on a transverse shaft 0 On a parallel cross shaft a are mounted certain wheels constituting parts of the tens carrying mechanism, two of these only appearing in the drawing, to-wit, the six-toothed wheel 11. and the three-toothed wheel a On another parallel cross shaft (1.1 are mounted a series of gear segments or toothed arms a which cooperate with the parts on the shaft a in the teas-carrying action. Said parts shown and identified cooperate with other parts not shown, but fully disclosed in my said pending application to afford a register wherein the number of counting wheels a may be simultaneously operated or rotated to different distances, in any order, by the register bars 0 under the forward motion of the computer carriage, and that, thereby, the tenscar'ryingdevices will be so set that the tens will be carried forward from one denomination to the other in the regular order of the decimal scale, or from rightto left, on the return motion of the computer carriage. The said parts of the said register are so constructed and so related that the register wheels a may all be brought. l ack to zero or starting position by the manipulation of a hand knob a on a shaft (1 journaled in the left side wall of the computer case, as shown in Fig. 3, andhaving on its inner end a segmental gear a, the teeth of which engage with a gear a on the shaft a supporting the register wheels a, and also with a gear.

I a on the shaft a which supports the sector gears a constituting parts of the carrying mechanism, as best shown in Fig. 8. These gears a, a and a are of such construction and so related to each otherand to the respective shaftson which they are mounted,- that. by turning the knob a in a forward direction, all the register wheels va will be brought back to thelnnormal or zero position, and all the carrying devices will then tion, and substantially the same as those in my prior patent, and hence, only a few of v the parts thereof will here be identified.

Directing attention especially to Figs. 1, 2, 3 and 4, it will be seen that the numeral keys of the typewriter have pivoted thereto depending racks b with the rack teeth'thereof" located at the lower end of the bar. Said rack bars 6 work through seats or slots 6 formed in the forwardly projecting flange or angle bar side piece of an oblong rectangular frame 17 supported from the computer case with its longer dimension crosswise of the register bars 0 and the key board of the typewriter. In the frame I) are journaled a series of nine rock shafts 6 spring held in their normal position. These shafts b have at their forward ends gears b which are engaged by the teeth of the racks 5 depending from the numeral keys of the typewriter. In the frame 6 are mounted nine so-called unit bars 5 parallel with each other and coupled by bell cranks 71 with a corresponding set of overlying tie bars I) with the unit bars located below and the tie v l andthis interference will occur sufficiently bars located above the cross rock shafts Z). The coupled parts 7) and 6 or in other words the unit bars and the tie bars, each are separately spring held in their uppermost or normal position. Each of said tie bars 5 is provided with a spring held pawl b and each of said rock shafts b is provided with a cam]; adapted to engage with the pawl of the proper tie bar when the corresponding numeral key of typewriter is operated 'soas to turn said rock shaft; and under this action, the tie bar I) will he pins-c which are frictionally seated'in a vertical position in each of the underlying register bars a.

It has already been stated that the rock r shafts 0 are each spring held in normal position. This is done by separate springs 6 The pawls b on the tie bars 6 and the cams b on the rock shafts b are so related that the cams will pass the pawls after moving the tie bars a roper distance, thereby permitting the coup ed bars 6 and 5 to be returned, by their retracting springs b to their uppermost or normal position, in advance of the return movement of the key lever- 4 and corresponding rock shaft 12 which had been actuated thereby. This insures the necessary quick action of the unit bars 72 so as to do the work on the pins 0 and get back out of the way before another register bar 0 islifted under the action of the tappet drum, as will later appear.

Comparison with my prior pending case will show that the only detail of difierence noted under this general heading is in the direct connection of the racks b to the numeral key levers 4 of the typewriter, instead of the use of separate computer keys capable of action on the numeral key levers of the typewriter.

In practice, I have found that on a combined machine of this class, or any computing machine, it is desirable to' avoid the possibility of operating any two of the adjacent numeral keys or keys operating the computer, at the same time; and one of my details of improvement is directed to this end. For this purpose, I place on the forward ends of the rock shafts b interfering pieces 6 which, on account of their function, might well be called key stops. Otherwise stated, these pieces b project ineach of two directions from the shafts to which they are fixed, and they all lie in a common plane and sufficiently close to each other so that any adjacent pair thereof will interfere with each other, if the corresponding numeral keys. are simultaneously depressed;

early to prevent the simultaneous full stroke of the said two keys Their action in this respect will be readily understood from an inspection of Fig. 4, wherein the fourth and fifth keys from the right are shown as partially depressed and the interfering or stop blocks 7) as engaging with each other and e unit bar 6 will bring the same in proper position to act on the proper member of the nine so-ealled unit preventing any further simultaneous lowering of the two keys. This is enough to secure the desired guard on the part of the operator, because the trouble, if any, always the subject arises from the operator striking two adjacent keys with a single fin er. The force of habit ornatural timing of the finger action insures the desired sequence in all other parts of the key board.

Experience has also demonstrated that on this combined typewriting and computing machine it is desirable to have a full stroke of the numeral key levers in each direction of their pivotal movement. The same key must not be used twice, in succession, without first substantially returning to its uppermost position, or otherwise the cam b on the corresponding rock shaft 5 may not come into position to engage with the pawl 7) of the cooperating tie bar Z2 which is coupled, as hitherto 11oted,with .the underlying unit bar 32 The key lever must also go downward to its limit, so as to make sure that the type bar will make the proper stroke and leave the desired impression of the type on the paper held against the typewriter laten roller. I therefore provide a twoway full stroke device of extremely simple and novel construction, and which is made matter of said separate application, S. N. 388,177, filed Aug. 12, 1907, so far its broad relations to the key lever in any sort of amachine is concerned. The said device is here shown, and combination claims including the same are here presented, however, because of its special relations to the immediately cooperating parts of the combined typewriter and computing machine herein disclosed. This full stroke device is illustrated in Figs. 1, 4, 9 and 10. By reference to these views, it will be seen that I provide as one element thereof a twoway or double-faced ratchet Z) fixed to one of the profile faces. of each of the numeral key levers 4"; and that, for cooperation therewith, I provide a pivoted pawl lever 71 pivoted to a stationary part of the typewriter frame and having at its,lower end a rhomb-shaped pawl tip 6 the opposite points of which are adapted to engage with the opposite faces of the double ratchet 7) in the opposite direction of the key levers pivotal motion. As shown, the pawl levers I) are pivoted at a point above their center of gravity, to the lower end projection of hanger brackets I) which are secured to a cross bar Z) fixed to the forward uprights or face plate of the typewriter. Springs 71 connect'the heads of each pawl lever I) with the upper end projections 1 of the hanger brackets I). The fulcrum point or pivotal center of each pawl lever 7), the anchorage point of the spring 6 the point of its attachment to the head of the pawl lever I) and the central line of the double ratchet I), are substantially in a common vertical line; and, hence, the said spring 6 tends always to bring the pawl lever into the position shown in Fig. 2 when the numeral key lever is in its uppermost or normal position; and when the parts are in this position, the pawl tip I) will lie directly under the lower end of the two-way ratchet I). The stroke of the key lever is slightly greater than the length of the said ratchet Z), and the ends of the ratchet b are so shaped as to have a-cainming action on the pawl tip I) which, in turn, give a pivotal motion to the pawl leverb, rocking the same forward or backwardagainst the tension of the centering spring 1)? far enough to shift the pawl tip from one to the other of the two faces of the ratchet, as required for the desired action in respect thereto. Hence, it

follows, in virtue of this construction, that if a numeral key lever be depressed from the position shown in Fig. 2, the lower end of the ratchet Z2 will strike the pawl tip I) and thereby swing the pawl lever Z1 slightly forward, so that under the continued downward motion of the key lever, said pawl tip will cooperate with the forward or front face or teeth of the ratchet; and, hence, if the operator should remove his finger from the key before he has made a complete stroke, the pawl tip will be in engagement with the ratchet, as shown in Fig. 9, and will thereby prevent the upward or return motion of the key lever. After a full downward stroke has been imparted to the key. lever, the centering spring 7) will swing the pawl lever rearward and bring the pawl tip 6 so that it occupies a corresponding position directly over the upper end of the ratchet b and when the key lever starts to return under the tension of its retracting spring, the top of the ratchet will strike the pawl tip and rock the pawl lever further rearward so that the pawl tip will cooperate with the teeth on the rear edge of the ratchet, as shown in Fig, 10; and, hence, it will follow that the key levercannot again be depressed, until it completes its upward or return movement, for if any premature attempt be made to depress the key lever, the pawl tip I) will engage with the tooth of the ratchet and hold the key lever. It therefore follows that this simple device nece+v sarily insures that the numeral key levers shall receive full strokes in each direction of their pivotal motion; and it further follows that the rock shafts I) and the unit bars 6 can be operated from the key lovers througn the racks depending therefrom, so to reliably insure the performance of their re quired functions.

As it may be desirable, some times, to release the numcral key lever from its cooperating full stroke device, the pawl levers Z) are each provided with upwardly extended releasing lingers b by which the said pawl levers may be rocked, by the operator, in either direction required for this purpose. In practice, I fix to the face plate of the 'vices' from being accidentally interfered with proper position to protect the full stroke deby the operator; and the top plate of this .tips of the releasing so far as deeme cation of the 1m rovement herein disclosed sidered.

The machine illustrated is shown as,

"the extreme left, are provided with shield-is slotted to permit the upper ends or fingers b to project therethrou h in osition to be seen and readily manipu ated y the operator. l The register bars, unit pins, 0 crating carridge and associated parts. 0st of these parts are identical with those shownin my pending application, and substantially the same as those shown in my prior patent, and hence, the old arts will only be identified es sential to showthe appliand claimed. Asto this "group of mechanism, it will be nwessary', however, to go into detail somewhat more fully thanha's been done with other groups-hereinbeforeconequipped with'eight register wheels a and seven of these, to-wit, all except the one at wheels a mounted on their hubs; and, for cooperation with these seven, gear wheels, seven rack-ended register bars 0 are provided and are arranged with their rack teeth held in engagement with the corresponding members of said gear wheels, all as best shown in Figs. 1, 2 and 7. Each gear wheel a is connected to its corresponding register wheel a through a suitable one-way clutch, such as a ratchet wheel and cooperating pawl, not shown. The eighth register wheel, to-wit, the one at the extreme left in respect to-Fig. 3, has no cotiperating register bar but is provided simply to accumulate the tens from the next lower denominational order.

It has been already noted that the register bars 0 are each provided with nine unit pins 0 frictionally seated therein and. subject to the action of the unit bars b. when the corresponding numeral keys 4" are struck. At their forward end portions,-the said register bars 0 have slots 0 extending lengthwise thereof, through which pass a guide rod 0 fixed to the sides of the register brackets 34 and serving to hold the rack ortio'n of the the'said bars 0,

bars 6 in mesh with the gear w eels a of'the register wheels a under the proper travel of and to permlt a pivotal motion of the said bars a on the said rod 0 as a fulcrum, when the said bars are in their rearmostor normal position, as required in order to have the unit pins 0 set by the unit bars 6 At their rearward portions the register bars a normally rest in and are guided by a vertically slotted guide plate 0 secured to the computer case 9, and the upward pivotal motion of said bars 'is limited by the vertical height of the slots in said gear subject to depressing springs 0 fixed to said plate 0' which normally: yieldin'gly hold the rear ends of the bars in their. lowermost position. The central'part of the register'bars e, or portion wherein the unit pins 0 are frictionally mounted, is of less height than the other portions of the'bars, and, directly ad'acent to the rear end of the reduced parts o the bars, they are provided with notches a which permit said spring depressed bars 0 to be raised for a limited dis-' -tance when they are in their rearmost or normal position, as required to bring the unit pins 0 thereof within range of. a unit bar 6 depressed under the action of one of the numeral keys but when the said register bars a are moved forward, even to a smallextent beyond their rearmost or normal position, their hi her portion will be under the overlying sol d part of the slotted guide plate 6, and they will thereby be held from any vertical motion whatever; and this relation is maintained all the time that the said bars are being moved forward by the computer carriage and until. returned thereby "to their extreme rearmost or normal position.

undercut to aiford a shoulder c on each bar with which'one of the latch levers f engages to hold the register bar in its uppermost position,,long enough to permit the desired unit pin 0 to be set by the unit bar and be so held until tripped out therefrom under the action of the next adjacent lifting lever hereafter be noted.

A pair of rack bars 0 extend lengthwise walls of the same, and are connected by a, rear cross tie bar 0 and forward cross bar 0 and the said parts together constitute the main portion of What is called the computer carriage, the same being so mounted as to rest upon the floor of the computer case 9 .and be properly held for straight line forward and backward motion, under the mathe right side of the machine, as best shown in Figs. 2, 3, 4 and 6. The hand lever 0 is and has on its opposite end a segmental gear wheel 0 which engages one of the members of a pair of small gear wheels 0" on an underlying'parallel cross shaft 0 and engaging with the racks c of the computer car- 'riage, as best shown in Figs. 1,

follows, that the computer carriage will be moved by and in the same direction as the hand lever 0 The cross bar 0 of the computer carriage is set on a slight upward incline and is so lolcated that, when the carriage is moved forgward, said bar a will engage with all of the At their rear ends, each register bar 0 is of the computer case 9 adjacent to the side.

nipulation of the hand lever 0 locatedat removably secured to cross shaft 0 which extends'entirelylacross the computer frame 2 and 3. It

106 operated by the rotary tappet drum, as will r unit pins 0 which have been depressed or set, under the key action, and thereby, move 2 riage. Usually the bars 0 will be so moved for'difierent distances. The left hand mom: ber of the pair of racks c constituting the side bars of the computer carriage, engages with a gear 0 journaled on a stud shaft fixed to hearing bracket 3& near the left side wall of the computer case and which, in turn, engages with a pinion c mounted on the tens carrying shaft a, as shown in Fig. 8. This pinion c connects with its supporting shaft by a one-way clutch, so that it is free to turn on the shaft when the computer can riage is moving forward; but when the computer carriage is returned toward the rear, the pinion a will be clutched tight to the shaft (1 and thereby impart. a full rotation to the shaft (4 and cause the tens carrying devices'properly to do their work so as to carry the tens on the register and be ready for the next addition.

,Vhatever members of the unit pins c have been set or depressed on the register bars (1 must, of course, be returned up ard to their normal position before they can be' reset'for another number. This is accomplished by a pivoted spring held restoring blade 0 fixed to a shaft 0 journaled in the computer case and provided at one end with a depending lug 1: which stands in the path of spring pawl 0" pivoted to the. left hand member of the pair of carriage rack bars ras shown in Fig. 1. these parts being so l'(' lated that, under a forward mov ment of the operating carriage the pawl will yield against its spring and pass under the lug (i of the shaft o but that, under an initial part of the return movement of the computer carriage toward the rear, the said pawl-0* will engage with said lug rock the pin restoring blade a upward and cause the same to restore all the set unit pins 0 to their uppermost or normal positibns. It will do this, because under the forward movement of the carriage, the set pins of the register bars were all brought. by the push bar 0 into a common line crosswise of the computer case; and hence, the said pins will be in a. common row directly above the restoring blade (2 at the time the latter is rocked. upward, under the initial return movement of the computer carriage.

The typewriter carriage is so connected with the hand lever c'-"- that the forward motion of the hand lever may be made to effect the line feed of the platen roller and to return the typewriter carriage to its right hand or initial position. For this purpose, these connections are exactly the same as in my prior application. The parts shown and thereby i herein include the flexible connection or strap 0 which takes hold of the line feed lever (3 of the typewriter platen on the typewriter carriage passes thence over a guide sheave a on ,the typewriter frame, and thence down to a spring held take-up wheel 0" suitably mounted on the outer face of the right hand wall of the computer case and havin on its hub a inion 0 which enva es b o b with a segmental gear 0 formed on a common hub with a notched segmental stop plate which integrally formed parts 0* and 0" are subject to a torsional spring tending to throw the same in the direction of the arrow shown in Fig. (5, thereby tending to rotate the take-up wheel 6" in the proper direction indicated by the arrow thereon to take up the slack in the connection (1 The tension of the spring c applied to the parts 0. r and a, as just hereinbefore noted. must be less than the tension of the spring on the line feed lever l of the typewriter platen. Alongside the notched stop segment w" is mounted, on the shaft 0, an adjustable stop arm adapted to be sprung into any one of the notches of said plate c'.- On the hand lever is mouiited a thumb action slide 0, held under sutiicient friction to stay wherever it is set, and when this is pushed to its lmvermost position, its lower end will engage with the stop arm a a d thereby make any further forward motion of the. hand lever operate the parts a, w; w and 1", and thereby wind up the strap A on the take-up wheel (4" and draw the typewriter carriage toward the right. if the stop arm 1 is properly set in respect to the notches of the stop segment If, for the 1wedetermintal line margin or initial-position of the typewriter carriage. then the forward motion of the hand lever o will restore the typewriter carriage to its right hand or start ing position. If the thumb slide 0" is raised to its u 'uwrmost limit, then the hand lever can be operated, as often as desired. without having any effect on. the typewriter carriage. and is so operated in making cross-footings of numbers listed in a horizontal line. When said hand lever 0 is in its rearniost or normal positioin'it rests against an elastic stop 0"" fixed to the adjacent wall of the computer case 0.

Devi/no.7. order selector or rotary tuppet drum and its flaaom'utml (Zen (re it is in this group of mechanism, as indicated in the introuuctoiw' statements. that the most radical features of my present invention appear. Many of the parts. however. are identical with those fully disclosed in my pending application. and many are also identical or substantially like those disclosed in my prior patent. Hem-e. the old notation will be followed as fa as practicable. This group of mechanism is best shown in Figs. 1. 2, 4, 5, t3, and 7. Y

Tit shaft f of thetappet drum or decimal cation, but instead of having a single whirl or row of spirally arranged tappets f 'i:,l'.18 shaft is now equipped with four whirls or spiral rows of such tappets, with eight tapl pets in each row or whirl.v Moreover, one of these tappets ineach, row or whirl has two points or tapping surfaces, and is located in the third position from the righthand of the drum, or a position corresponding to that required for a period when listing decimal numbers, as dollars and cents. In other words, the two pointed tappet is for the purpose of punctuation, in order to permit a space to be secured and a period printedion the typewritten sheet, and also has a safety function hereinafter noted. The reason for the use of the four whirls or spiral rows of tappets f is to enable the cross footings or listing of numbers in horizontal lines on the typewritten sheet, and the adding together of said numbers on the computer so that the totalthereof can be printed, by the typewriter, at the right hand margin of the printed sheet. .The'tappet drum-is driven from a suitable motor spring f fast at one end to a winding shaft 7", and its other end to a spring barrel or case i shown. in Figs. 3, .5, 6 and 7. Said spring case or barrel f is loose on the winding shaft f and has formed integral therewith a gear 7" which meshes with a pinion f fixed to the tappet shaft f. Hence, when sopermitted, the motor spring f" in the barrel or casing f will impart rotary motion to the tappet shaft f l and the tappets 7. On the tappet shaft 7 is fixed a' bevel gear f which engages a bevel, pinion f fixed to the lower end of a vertical shaft f mounted in suitable bearings on the typewriter case and computer case, and having at its upper end a similar bevel pinion f 'with the same number of teeth and which engages with the bevel gear f, fixed to a counter shaft suitably journaled in the typewriter frame. On the said counter shaft is mounted, with freedom for sliding motion, a wide faced pinion 7' that remains always in engagement,' with the gear 7 to which the motor spring of the typewriter is applied, and which gef'r 7 is in engagement with the fixed rack 8 of the typewriter carriage. The parts 7 and f are provided with half clutches f adapted to engage with each other when the pinion f is at the rearmost limit of its sliding motion. The sliding pinion f is subject to a shipper lever or push bar which, because of itsfunction, is called the adding switch or switch key and is marked 7". This switch key 7 has notches 7' which may be engaged with the slotted face plate of the Etypewriter casing, through which the said lever projects, to lock the l, I, i,

switch key in either its forward or rearward position, as can be readily understood from Fig. 1'. At its rear end, the switch key bar f is bent laterally and provided with pins projectin forwardly, adapted to engage with the note ies of a lock disk f fixed to or formed integral with the bevel pinion f, so asthereby to lock and hold the said pinion f and all its connected parts in its locked or idle position, at the time when the switch key f is drawn to its forward or unclutched position. When the switch key f is pushed to its rearward position, the parts f and P will be-clutched together, and theescapement of the typewriter will then be made to control the rotary motion of the vertical shaft under the key action; and, hence, will also control the rotary motion of the tappet drum 7 f. The gear connections are such, in point of relative size or number of teeth, that the tappet shaft f turns two full revolutions while the typewriter carriage makes one full movement from the right toward the left. As there are four whirls or spiral rows of the tappets f, it follows that each row of tappets f can operate twice on the lifting levers f during one complete traveling movement'of the typewriter carriage.

It further follows from this, as will presently more fully appear, that the machine is capable oflisting and adding in a single horizontal line'eight numbers, as shown in the illustrations given in the introductory statement.

In suitable bearings fixed to the computer case 9, properly spaced apart from each other, is journaled a rock shaft f located below and slightly to the rear of the register bars 0 and below and slightly to the front of the rotary tappet drum f j, as best shown in Figs. 1, 5 and 7. To this shaft are rigidly secured a pair of triangular shaped heads or brackets f, the upwardly projecting tips of which are rigidly connected by a cross tie rod 7. The said partsf, and f, taken I together, constitute a rocking frame which is subject to a retracting spring f shown in Fig.'3 as a torsional spring applied to ne of the heads f, which tends to hold the s id frame in its rearward or normal rocking position. I

On the tie rod f are pivoted the series of lifting levers f for lifting the register bars '0, under the action of the tappets f of the tappet drum. Said lifting levers f are of such construction that their forward or long arms have parts underlying the respective register bars 0, and that their rear or short arms have parts standing in the paths of the tappets j of the tappet drum, whenthe rocking frame composed of the parts f f,

f and f is in its rearmost or normal position. These lifting levers i stand in their normal or idle position under the action of gravity, with their long arms in their tired stop lo ermost position resting'o'n a H7432 0n the shaftm of the rocking frame are pivoted a corresponding series of latch levers f which are normally held in their forward position by a corresponding series of springs These latch levers f have lateral studs f which, under the spring tension on the latch levers, normally abut against the rear ends oi the register c in oroper position under the shoulders 0 of re;- 0 when the latter are raised to their permost limit by the lifting levers f, un-

the action of the tappets f of the tappet un, thereby serving to hold the particular a gister bar 0 lifted up long enough to permit he proper pin 0* thereof to be set, by the iroper member of the unit.- bars Z), under L e key action, Said lateral studs f are of such length that they pass to the right beyond the bars 0 against which they yieldg'ly abut, so that the projecting ends therei stand in the paths of upwardly projecti- 'ipinp' fingerv f formed integral with l mg: levers f. The portion ot the 3 arm of any 3 ioular register bar 9 is offset toward the, right so as to be staggered in spect to the tripping fingers f. Etherwiee stated, these parts are so related that the tripping finger f of any lifting lever i will operate on an adjacent latch lei "er f to release the register bar 0 last previously lifted, or bar 0 of the next higher denominational order, just in ady ancc ot the tune when the long arm of thelifting lever f ill lift the register bar 0 of the next lower order. Gtherwise stated, thelitting levers it", under the action of the tapp'cts f of the tappet drum, operate on two adjacentreg-isr bars a, in the proper sequence, nearly sit .ultaneously to release the bar previously lifted and permit it to be instantly returned to its normal position by its depressing spring and to littthe register bar c of the next lav, order to a point where it is caught and will be held by its cooperating latch lever f. it must, therefore, be obvious that, under the action of the rotary tappet drum, the register bars 0 will be lifted and released in the proper order, and each lifted register ba will be held up long; enough by its cooperating latch f to permit its proper unit pin 0 to be set by the proper unit bar 7f under the key action.

To the bevel gear wheel f, fixed to the tappet shaft-f, is rigidly secured a ratchet wheel f which is normally engaged by a gravity acting retaining (log or pawl f (see Fig. G), which serves to prevent any return rotary motion of the tappet drum until the said ratchet f is released from said 1 F The "forward or long arm of this overlies a rearwardly projecting rej arm j' flXO(l to the shaft t ot the en lifting lever f which so-cal ed rocking frame'rnade up of the parts f and f hitherto noted. When the computer carriage is in its rearmost or normal position, as shown inFigs. l and 3, the rocking frame, made up of the parts f, f and f is held in its rcarmost posit-ion by its retracting s1 ring;- f"', as hitherto noted;- and, at this time, its roller f, carried on the forward corner of its right hand. frame plate f, can rise to its limit in a notch f in the right hand rack bar 0 of the computer carriage. This notch f is so related to the undercut part of the bar o which extends rearward thereof, that when the computer carriage is drawntorward, the notch will have a c'amming action on the roller so as to force the same downward and rock the -Eran-1e forward, thereby bringing the roller under the undercut part of the oar 0, by

which the rocking trame will then be held in its forwardly tilted position, or as shown in Fig, 2, until the computer carriage is again returned to its rearward position. During the time that the rocking frame is so held, the lifting lcrers'will be outside the field of action of the tappets f. lhis' downward cannniug action on the roller f occurs at the very initial part of the forward motion of the computer carriage, or forward motion on the hand lever 0 and hence, the forward rocking motion of the shaft f of this rocking frame will raise the releasing arm f projecting rearward therefrom, and knock the retaining dog f out of the ratchet disk f on the tappet drum shaft thus re leasing said tappet drum and permitting the same to turn backward under the forward motion of the hand lever c or during the return motion of the typewriter car iage to' its right hand or starting position.

Referring more in detail to the twopointed member of the tappets f, the same has a double purpose or function. It not. only serves to permit a space movement of the typewriter carriage Without setting any unit pin, and hence, wherein the punctuation mark may be printed; but it insures a register bar 0 being in proper position to get a unit pin set when the next. numeral key is struck, and thiseve'n it a tabulati'ng device he used on the typewriting machine. In the machine of my pending application, one tappet was leftout to ati'ord circumferential gap in the circle of the tappet drum so that a punctuation key or the space car could be struck and the carriage be permitted to move one step without bringing any part of the tappet drum into action on the lifting levers or the register bars. In practice, it was found that an operator might strike the space bar and follow with the numeral key so quickly, or strike the two so nearly together in point of time, that the following tappet of the drum might not have rotated far enough. to act on a lifting lever tilted forward, at the instant the tabulating key-should be the one struck. These tabulat- 'is struck and the pin is bound to be set. The

second point of the double pointed tappet will then have no action on the register bar.

The second point of the two-pointed tappet is needed when a tabulator is employed, as is usual on the commercial machine. WVhen a tabulator is employed, the rocking frame, made up of the parts f, and f, is

key is depressed; then the typewriter carriage'moves to the tabulating stop, and the tabulating key is released, thus permitting the said rocking frame to return to its nor mal position under the actionof its retracting spring 7. If the tabulating stop arrested the carriage and the tappet drum opposite a predetermined punctuation point space, as, for example, a space for a comma between two sets of three numbers, then the advance member of the two-pointed tappet will'be in such position that it cannot operate on a lifting lever 7 when the next key is struck, butthe second or following point of the two-pointed tappet would be in such position that it would surely operate on one of the lifting levers f and raise one of the register bars 0 and latch the same up, in time to insure the setting of a unit pin, if a numeral ing devices are shown in my pending application, but are not illustrated in this case. lVith said. tabulating devices, the typewriter carriage makes one step of movement upon the release of the tabulating key, as is cus tomarywith all such devices; and this is the reason why the advance point of the twopointed tappet will not be in position to op.- erate on the lifting lever. 1

The parts so far specified enable the combined machine to cross list and add numbers in a horizontal line. The machine could also be manipulated to list and add numbers in, vertical columns, but it would not be possible to specify, on the same cross line, the details or items making up the charge number, if such specification should require the use of any of the numeral keys; or otherwise stated, it would not be possible to do a piece of work like the invoice illustrated in the introduc= tory statement. The parts which I have added to this group of mechanism in order to make the machine do work like that illustrated in the invoice, will now be described, special attention being called to Figs. 3, 5, G and 7 of the drawings. i

A cam has formed integral therdwith l or secured thereto a gear wheel f; and these parts are mounted on a stud 7 fixed to hearing bracket 1'' rising from the bed of the computer case 9, to the left of the center of said case and directly in front of the tappet drum shaft 7", as best shown in Fig. 3: The gear f engages with a pinion or smaller gear f fixed to the tappet shaft f. The sizes of the said gears f and f are related as two to one; from which it follows that the cam f will receive one full revolution in two revolutions of the tappet drum shaft. The cam f is of disk-like form, and its periphery is the active surface of the cam. For about three-fourths of the circumference of the cam disk, its periphery is struck from a common center with a common radius, and then, for a little more than the other fourth of its surface, the disk is reduced so as to have a low part, as shown in Fig. 6. roller-equipped cam lever f is loosely sleeved on a sleeve f which is adjustably and rigidly secured to the shaft f of the rocking frame made up of the parts 7, f and f hitherto noted. Said two sleeves have slot and pin connection, as shown at f, Fig. 3, so that the said lever f is capable of a sliding motion lengthwise of the said sleeve f on the said shaft 7. The roller of the said lever engages with the peripheral or active cam surfaceof the cam disk 7 when the parts are in the position shown in Fig. 3. The cam lever f is embraced by the up wardly extending prongs of a shipper. lever f resting on the bed of the computer case, as shown in Fig.6, pivoted thereto at f for sidewise motion, and at its forward end has a pin 7" adapted to be engaged by a spring latch f with two notches spaced apart and adapted to hold the shipper lever f in two different positions as required for holding the cam lever f in or out of engagement with the cam f, as may be desired. For greater convenience in operating the shipper lever f, it is provided at its forward end, with a pin f which projects downward through a slot f in the bed of the computer case, as shown in'Fig. 3, where'it can be easily reached by the operator. The slot and pin connection between the sleeve f fixed to the shaft f and the hub or sleeve portion of the cam lever 7, as shown at f, permits the required sliding motion of the cam lever f while requiring the same to rock with the sleeve 7 and the shaft 7' of the-rocking frame, so that when the rocking frame is tilted forward, the roller of the cam lever will be rocked forward or out of the path of the periphery of the cam disk f The releasing arm f for the retaining dog 7 which acts on the ratchet wheel f of the tappet shaft f, as shown in Fig. (3, is formed as a rearward extension of the cam lever f. Theactive surface of this releasing arm f is such the be'again recalled that the high of the cam disk f extends about low surface about or a little more than onet'ourth thereof, the further action of these parts can be readily understood. d hen the cam lever f is in the position shown in 2%. its roller engages the cam disk f and the parts are so related to the rocking "frame made up of the elements 7", f and f hitherto several times noted, that as long as the high part of the cam disk engagesthe roller ,ot the cam lever, the said rocking frames will be held in its foremost positlon, and all t lifting levers f" carried y its n'ieniber 1 will be held so far forward as to clear all the tappets ft of the rotary tappet drum; but the drop in the cam surface t, as soon as the roller of the cam lever passes oft from the high to the low surface oi the cam f, the rocking frame will be instantly restored by its retracting spring 1 to its rearmost position, thereby bringing the lifting levers f within the reach of the tappets f of the-rotary tappet drum. Hence, it is obvious, that this cam device just hereinbetore described will, when set as shown in 3, permit the rotary tappet drum to make one and three-fourths revolution before any of its tappets will operate on the lifting levers f; and then, for the remaining tourth of the tappet drums revolution, the tappets of one whirl or spiral row of tappets F Will be operative on the lifting levers and the register bars.

From the foregoing, it will be seen that the cam f and its associated devices, con stitute a controller for rendering all the four whirls or spiral rows of tappets f of the a ppet drum inoperative during seveneighths ot' the total working travel of the typewriter carriage, and one of said whirls or spiral rows of tappets to become operative during the final eighth of the travel of the typew 'iter carriage, thus adapting; the 1nachine to do work like the invoice.

lt is equally obvious, that to adapt the machine to the two different kinds of work, illustrated in the introduction, that it is only necessary to shift the cam lever f from its active to its idle position, or vice versa, which can be readily done by manipulating the shipper lever f.

The winding shaft 7' of the spring motor of the computer is subject to a winding key 7", as shown in Fig. 3, and tea locking lover f which cotip'eratcs with a. ratchet (notshown) but which is fixed to said winding'sliatt 7 to hold the motor spring f .i' n der the tension to which it is wound. The

spring barrel f is provided with a lateral stop lug f" which cooperates with vertical stop pin 7 fixed to the bed of c case for limiting the rotation of th barrel f when it moves far enough in ei h direction; and this stop device prevents any further change in the tension of the spring, after it has been properly wound, than that which comes from its normal or proper use in the service. 01 course, the spring barrel 7' receives reverse or spring winding moveinent trom the tappct drum when the typewriter carriage returned to its normal right hand position.

Error correcting device-For this purpose, in my present i'nachine, make use most of the devices employed for that purpose in the machine of my pending application, and simply add other parts with view of securing increased etticiency. The parts of the error-correcting device are best shown in Figs. 1, 3 and 7, and are marked with the reference letter In and its powers, as in my pending case.

A pair of parallel bars 7c are rigidly coir nectcd by a cross tie or shaft h which is journaled in suitable bearings fixed to the bed of the computer case. as clearly shown in Figs. 1 and 7. The rear ends of the bars I; are also connected by a cross plate 7r? oi the proper surface dimensions to underlie all the unit pins 0 of all theregister bars 0. At their forward ends, the bars 7: are connected by a cross tie fr". The parts marked 7r to le inclusive, constitute a tilting table which is brought into action whenever so desiredto restore any one or more of 1nisset unit pins 0 to correct an error. This can be done by simply pressing, down the forward end of the tilting table. As a corn vement and reliable means tor this purpose,

there is mounted directly above the cross tie puter case, and is provided with a small handle k ltlormally, the handle Z1 is in the position shown in Fig. (5, and the can: b, and the tilting table, will then be In the position shown in Fig. 1 of the drawings. When, however, it is desired to operate the error-correcting table. the handle ll' is pulled forward, thereby bringing the parts into the position shown in Fig. 7, where they will be held under sutticicut friction to prevent any accidental displacement thereot, from the tact that the cum 1- has been moved rearward beyond the axis ot the cross tie it? under the sirin ino' actn i 7 #3 parts hitherto noted. The 19131; forward en, ot' the crror-corrocting i 

